Black Screen
Fill your entire screen with solid black, instantly. Use it to check for OLED burn-in, dim a room, or as a plain dark background. No install, no sign-up.
What people use a black screen for
Check for OLED burn-in
A full black screen makes faint burn-in, uneven backlight bleed, and stuck bright pixels easy to spot on OLED and LCD panels.
See your reflection in the dark
A black screen turns your display into a makeshift mirror, useful for a quick check in low light.
Take a black screen selfie or photo
Use a solid black backdrop behind your camera or as a plain dark background for photos and screen recordings.
Dim a shared room
Cut the light from your screen to near zero without turning off the device, useful at night next to someone sleeping.
Save battery on OLED devices
OLED and AMOLED screens use less power to display black, since those pixels turn off completely.
Present a plain dark background
Use it behind a webcam feed, product shot, or slide transition when you need pure black, not dark gray.
Black screen vs. turning your screen off
Powering off
Stops the display from drawing any image and, on most devices, drops the screen into a lower power state. You cannot see anything, including subtle backlight bleed or a faint stuck bright pixel.
This tool
Keeps the screen on and actively rendering pure black, so you can still see backlight bleed or a stuck pixel against true black, use it as a dark background, and exit instantly by tapping anywhere instead of waking the device back up.
OLED burn-in checks
How to check
Go full screen in a dark room. Any residual image appears as a very faint variation in the otherwise uniform black field, most visible at an angle rather than straight on.
Black screen as a low-light mirror
A glossy black screen reflects enough ambient light to work as a rough mirror in dim conditions, useful for a quick check before stepping out, or a black screen selfie without a dedicated camera app.
Does black actually save battery?
| Panel type | Saves battery? | Why |
|---|---|---|
| OLED / AMOLED | Yes, meaningfully | Black pixels switch off individually, drawing no power |
| Standard LCD / LED-backlit LCD | No, or only marginally | The backlight stays on at a fixed level regardless of on-screen color |
If your device has an OLED display, recent iPhone and Samsung Galaxy models being the most common example, using true black for wallpapers, dark mode interfaces, and this tool measurably reduces power draw compared to a bright white screen.
Black screen for white noise and sleep
People searching for terms like “white noise for sleeping black screen” or “12 hours white noise black screen” are usually playing a sound app or video in one tab and want another tab or window showing solid black, so a bright video player or lock screen does not light up a dark room overnight. Open this tool in a second tab or window alongside your sound source, go full screen, and set your device to prevent sleep so the black screen does not time out.
Different phrasings, same tool
If you are seeing an unexpected white circle, box, or cross overlaid on a black background on your own device during startup or normal use, that is a manufacturer-specific error indicator, not something this tool produces or controls. Check your device manufacturer’s support documentation for what that specific icon means on your model. If instead you are seeing an unexplained mark during normal color content, see white spots, dots, and lines on your screen to diagnose it.
How OLED burn-in actually happens
For more on how OLED burn-in develops and how manufacturers recommend avoiding it, see Samsung’s support guide on screen burn-in, which covers static-image exposure time and the screen-saver and pixel-shifting features most OLED devices use to reduce risk automatically.
Common questions
How do I turn my screen completely black?
Click "Go Full Screen" above. Your display fills with solid black using your browser's Fullscreen API, with no software to install.
How is this different from turning off my screen?
Turning off your screen stops the display entirely. This tool keeps your screen on and renders solid black, so you can still see subtle backlight bleed, use it as a dark background, or exit instantly by tapping anywhere.
Does a black screen actually save battery?
On OLED and AMOLED screens, yes, since black pixels are switched off individually. On standard LCD screens the backlight stays on regardless of color, so the battery saving is minimal.
How do I exit the black screen?
Press Escape or tap anywhere on the black screen to return to this page immediately.
Can I test for burn-in with this tool?
Yes. Go full screen and look for any area that appears slightly lighter or has a visible outline of a previous image. That pattern indicates burn-in on OLED panels.
Can I use this as a black screen for white noise or sleep sounds?
Yes. Many people play white noise or ambient sound from a separate app or tab while keeping this tool's black screen on top, so the display stays dark instead of showing a bright video player or lock screen through the night.
What does a black screen with a white circle or box mean on my device?
That is different from this tool. A white circle, box, or cross appearing on your own device's screen during startup or use is usually a manufacturer error indicator, not something this tool produces. Check your device manufacturer's support documentation for what that specific icon means on your model.